<template>
  <div class="header">
    <div class="collapse-btn" @click="collapseChage">
      <i class="el-icon-s-fold" v-if='!collapse'></i>
      <i v-else class="el-icon-s-unfold"></i>
    </div>
    <div class="logo" style="text-align: left;">
        <img src="../../assets/img/soft.jpg" style="width:180px;height:70px;"/>    
    </div>
    <div class="header-right">
      <div class="header-user-con">
        <!-- 全屏显示 -->
        <div class="btn-fullscreen" @click="handleFullScreen">
          <el-tooltip effeck='dark' :content="fullscreen?`取消全屏`:`全屏`" placement='bottom'>
            <i class="el-icon-rank"></i>
          </el-tooltip>
        </div>
        <!-- 消息中心 -->
        <div class="btn-bell">
          <el-tooltip effect="dark" :content="message?`有${message}条未读消息`:`消息中心`" placement="bottom">
            <router-link to="/tabs">
              <i class="el-icon-bell"></i>
            </router-link>
          </el-tooltip>
          <span class="btn-bell-badge" v-if="message"></span>
        </div>
        <!-- 用户头像 -->
        <div class="user-avator" >
          <img src="../../assets/img/img.jpg"  />
        </div>
        <!-- 用户名下拉菜单 -->
        <el-dropdown class="user-name" trigger="click" @command="handleCommand">
          <span class="el-dropdown-link">
            {{username}}
            <i class="el-icon-caret-bottom"></i>
          </span>
          <el-dropdown-menu slot="dropdown">
            <el-dropdown-item divided command="loginout">退出登录</el-dropdown-item>
          </el-dropdown-menu>
        </el-dropdown>
      </div>
    </div>
  </div>
</template>
<script>
import { getLocalStorage, removeLocalStorage } from '../../common/js/util.js'
import bus from '../common/bus'
export default {
  data () {
    return {
      collapse: false,
      fullscreen: false,
      message: 2,
      username: 'admin'
    }
  },
  methods: {
    collapseChage () {
      this.collapse = !this.collapse
      bus.$emit('collapse', this.collapse)
    },
    handleCommand (command) {
      if (command === 'loginout') {
        const user = getLocalStorage('userInfo')
        this.$axios.post('/login/logout',
          { user_id: user.id, user_name: user.name })
          .then(res => {
            if (res.status === 200) {
              this.$router.push('/login')
              removeLocalStorage('user')
              removeLocalStorage('Authorization')
            } else {
              this.$message.error(res.msg)
            }
          })
      }
    },
    handleFullScreen () {
      const element = document.documentElement
      if (this.fullscreen) {
        if (document.exitFullscreen) {
          document.exitFullscreen()
        } else if (document.webkitCancelFullScreen) {
          document.webkitCancelFullScreen()
        } else if (document.mozCancelFullScreen) {
          document.mozCancelFullScreen()
        } else if (document.msExitFullscreen) {
          document.msExitFullscreen()
        }
      } else {
        if (element.requestFullscreen) {
          element.requestFullscreen()
        } else if (element.webkitRequestFullScreen) {
          element.webkitRequestFullScreen()
        } else if (element.mozRequestFullScreen) {
          element.mozRequestFullScreen()
        } else if (element.msRequestFullscreen) {
          // IE11
          element.msRequestFullscreen()
        }
      }
      this.fullscreen = !this.fullscreen
    }
  },
  mounted () {
    if (document.body.clientWidth < 1500) {
      this.collapseChage()
    }
  }
}
</script>
<style scoped lang='less'>
.header {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  height: 70px;
  font-size: 22px;
  color: #fff;

  .collapse-btn {
    float: left;
    padding: 0 21px;
    cursor: pointer;
    line-height: 70px;
  }
  .logo {
    float: left;
    width: 250px;
    line-height: 70px;
  }
  .header-right {
    float: right;
    padding-right: 50px;
    .header-user-con {
      display: flex;
      height: 70px;
      align-items: center;
      .btn-fullscreen {
        transform: rotate(45deg);
        margin-right: 5px;
        font-size: 24px;
      }
      .btn-bell,
      .btn-fullscreen {
        position: relative;
        width: 30px;
        height: 30px;
        text-align: center;
        border-radius: 15px;
        cursor: pointer;
      }
      .btn-bell {
        .el-icon-bell {
          color: #fff;
        }
        .btn-bell-badge {
          position: absolute;
          right: 0;
          top: -2px;
          width: 8px;
          height: 8px;
          border-radius: 4px;
          background: #f56c6c;
          color: #fff;
        }
      }
      .user-avator {
        margin-left: 20px;
        img {
          display: block;
          width: 40px;
          height: 40px;
          border-radius: 50%;
        }
      }
      .el-dropdown-link {
        color: #fff;
        cursor: pointer;
      }
      .el-dropdown-menu__item {
        text-align: center;
      }
    }
  }
}
</style>
